Shakugan no Shana

The world's balance is under threat by abominations called Guze no Tomogara (Denizens of the Crimson Realm) and their subordinates, the Rinne. The fate of the world rests on the shoulders of Flame Haze; exceptionally-trained warriors bent on defeating the Tomogara and restoring the world's balance. An unnamed Flame Haze who goes by the title "Flame-Haired-Red-Hot-Eyed Hunter" meets a high school boy named Sakai Yuji. In a random battle, this Flame Haze reveals to Yuji that he is dead and is nothing more but a Torch, a replacement for the existence lost as a result of the Tomogara consuming the power of existence. Soon, this Flame Haze realize that he is no ordinary Torch but a Mystes; a special kind of Torch containing some kind of Hougu inside. Being named by Yuji as Shana, the two of them embark on a quest to protect the balance of the world from the wrath of the Tomogara.